Body composition / Krakow buying guide
Withings Body Smart is the selected scale because it sends weight and body-composition trends into the purchased WHOOP workflow. Treat its body-fat number as a noisy trend, not a measurement of truth.
Prices checked 10 August 2026. Stock and delivery can move quickly. These links are not affiliate links.
Buy this if the main objective is an automatic Garmin weight graph. Wi-Fi sync sends weigh-ins to Garmin Connect without opening another app.
Better choice if you expect to move toward WHOOP. Withings can send weight, body fat, and lean mass into WHOOP for a unified recovery view.
Its handle adds upper-body electrodes and segmental estimates. That is technically richer, but it is still BIA and does not justify the premium if accuracy is the goal.
Consumer scales are useful because repeated measurements reveal direction. Their fat and lean-mass estimates are heavily shaped by hydration and the prediction equation.
A systematic review against four-compartment models found average body-fat bias from about -3.5 to +4.4 percentage points. Individual limits commonly spanned roughly 15 to 20 points, far too wide for a single reading to guide decisions.
Garmin itself notes that hydration, food, exercise, bathing, and time of day can alter composition readings. Standardization helps trend quality but cannot make BIA a reference method.
Segmental hand-and-foot devices measure more pathways. They still infer tissue from impedance using population equations. InBody and Tanita remain BIA too.
Consistency beats feature count. Use the same conditions, let software smooth daily water shifts, and make decisions from several weeks rather than one morning.